Machine for drawing and cutting ovals



(MbdeL) E. L. GAYLORD.

Machine for Drawing and 'GuttingOvals. No. 234,268. Patented Nov. 9,1880.

wnmzs INVENTOR: mfi BY :l

* ATTORNEYS.

N PETERS. Pnofo-urnoamrusn, WASNNGTON. D c.

] UNITED STATES PATENT ()EEICE.

EDWARD L. GAYLORD, OF BRIDGEPOR'I, CONNECTICUT.

MACHINE FOR DRAWING AND CUTTING OVALS.

SPECIFICATION forming part of Letters Patent No. 234,268, dated November 9, 1880. Application filed July 17, 1880. (Model) To all whom it may concern:

Be it known that I, EDWARD L. GAYLoED, of Bridgeport, in the county of Fairfield and State of Connecticut, have invented a new and useful Improvement in Ellipsographs, of which the following is a specification.

Figure I is a plan view of theimprovement. Fig. 2 is a sectional elevation taken through the line at m, Fig. 1. Fig. 3 is a sectional elevation taken through the line 3 3 Fig. 1. Fig. 4 is a plan view of one of the guide-pivots. Fig. 5 is a side view, partly in section, of the cutting and scoring tool.

Similar letters of reference indicate corresponding parts.

The object of this invention is to furnish ellipsographs so constructed that they may be adj usted to describe ovals of different sizes with parallel curves without disturbing the guide-pivots, and to cut ovals with their edges straight or beveled in either direction, as desired.

The invention consists in constructing an ellipsograph of the cross, the flattened guidepivots, the clamps and set-screws, the beam, the extension-bar, its clamp and set-screw, the hinged socket having semicircular projection, and the concaved shoe and its set-screw, whereby the instrument can be set to describe larger or smaller ovals upon parallel curves without adjusting the guide-pivots, and can cut ovals with straight or inclined edges, as will be hereinafter fully-described.

A represents an equal-armed right-angled cross, to the lower side of the end parts of two or more of the arms of which are secured points B to prevent the instrument from slipping while being used.

In the center of the cross A is formed a hole, 0, to receive a screw for securing the cross to the board or table when doing heavy work. In the upper sides of the bars of the cross A are formed T-grooves to receive the necks and heads of the guide-pivots D, which are swiveled to the bottoms of the U-clamps E. The necks of the guide-pivots D are made fiat and wider than they are thick, so that they cannot turn out of their own grooves into the crossgrooves, and will thus guidethemselves. The clamps E are provided with set-screws F for securing the beam G in place, and have disks H, of copper or other suitable soft metal, placed in the inner parts of their screw-holes, to come between the forward ends of the screws F and the sides of the beam G to prevent the said beam from being marred and from slipping upon the said screws.

In the upper side of the beam G is formed a longitudinal groove to receive a tongue formed upon the lower side of the bar I, to prevent the bar I from turning upon the beam G, and thus keep the bar and beam always parallel.

J is a U-clamp, the bend of which receives the bar I, and its ends are secured to the opposite sides of the beam G.

In the bend of the clamp J is formed a screw-hole to receive a set-screw, K, for securing the bar I firmly in place upon the beam G.

In the forward part of the bar I is formed a short longitudinal slot to receive the socket L, which has a square perforation formed through it to receive the square shank of the tool M.

Upon one end of the tool M is formed acutter, N, and upon its other end is formed a scorer, O. The tool M N O is provided with a knob, P, the cavity of which is soformed as to fit upon either end of the said tool.

Upon the inner side of the center of the socketL is formed a projection, Q, which is perforated transversely to receive the pin or rivetR that hinges the said socket L to the bar I.

Upon the outer side of the center of the socket L is formed a semicircular projection, S, which fits into a semicircular recess in the inner side of the block or shoe T, placed in the outer end of the slot in the bar I. The shoe T is forced against the projection S, to clamp the socketL firmly in any position into which it may be adjusted by a set-screw, II, passing in through a screw-hole in the end of the bar I; or the slot of the extension-bar I may be extended to the end of the said bar I, and the socket L clampedin place,when adjusted, by aclampingscrew passing through the said slotted end. The socket L is also designed to receive a penoil for marking out an oval. WVith this construction, when the guide-pivots D have been adjusted to cause the instrument to describe an oval of the desired curve, the extension-bar I can be moved out or in. and the instrument I cure a simple and ready adjustment of parts, 2 5

will describe a larger or smaller oval, with its 1 describing and cuttineont the ovalst'or passcpartout mats, in which case, by adjusting the socket L, the ovals can be out with their edges straight or beveled in either direction, and by reversing the tool M N 0 lines can be scored in the mat parallel with the perimeter of the said oval. The instrument is very convenient wherever ovals are to be described.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an ellipsograplnthccombination, with the cross A, of the guide-pivots l), clamps I F, the beam G, provided with a groove in its upper face, the extension-bar 1, provided with it tool-holder in its end and with a rib upon its under face to fit the said groove, and secured to the said beam G by the clamp J K, to sesubstantially as described.

.2. In an ellipsograplnthe combination, with the extension-barl, ofthetool-socketL,hinged upon a horizontal axis to the end of the extension-beam, substantially as herein shown and described, whereby the socket Loan be adjusted in a vertical and inclined position,as set forth.

3. In an cllipsogzraph, the combination, with the extension-bar I, the tool-socket L,hinged at the end oftheextension-bartoswing vertically, and provided with a projection,S, the concave shoe T, and set-screw U, the socket L being also provided with a longitudinal opening to receive the shank of the reversible tool M, provided at one end with aeuttcr and at the other end with a scorer, substantially as herein shown and described, whereby ovals may be cut with straight and beveled edges, as set forth.

EDWARD L. GAYLORD.

Witnesses:

JAMES 'l. GRAHAM, U. SEDGWICK. 

